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[8.19] docs: clarify ES version compatibility and downgrade guidance (#4568) - #4569
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## Summary Documentation-only change: clarify how self-managed connector service versions relate to Elasticsearch (including serverless), simplify the README compatibility table, and warn against downgrading the connector service when connector configs may have changed. No GitHub issue — follow-up from internal Slack discussion on Serverless / support matrix (matrix links to README for version pairing). ## Checklists #### Pre-Review Checklist - [x] this PR does NOT contain credentials of any kind, such as API keys or username/passwords (double check `config.yml.example`) - [x] this PR has a meaningful title - [ ] this PR links to all relevant github issues that it fixes or partially addresses — **N/A (no issue; ad-hoc docs)** - [x] if there is no GH issue, please create it. Each PR should have a link to an issue — **skipped per team agreement for this docs follow-up** - [x] this PR has a thorough description - [ ] Covered the changes with automated tests — **N/A (docs only)** - [x] Tested the changes locally — reviewed markdown rendering - [x] Added a label for each target release version (`v9.6.0`) - [ ] For bugfixes: backport safely to all minor branches still receiving patch releases — **N/A** - [x] Considered corresponding documentation changes - [ ] Contributed any configuration settings changes to the configuration reference — **N/A** - [ ] if you added or changed Rich Configurable Fields — **N/A** #### Changes Requiring Extra Attention - [ ] Security-related changes (encryption, TLS, SSRF, etc) - [ ] New external service dependencies added. ## Related Pull Requests * elastic/search-team#15961 (release runbook — support matrix executor) ## Release Note N/A — documentation clarity for operators; no product behavior change. --------- Co-authored-by: Elastic Machine <elasticmachine@users.noreply.github.com>
entsearchmachine
approved these changes
Oct 6, 2026
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Jan-Kazlouski-elastic
enabled auto-merge (squash)
October 6, 2026 15:21
Jan-Kazlouski-elastic
approved these changes
Oct 6, 2026
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Backports the following commits to 8.19: